On the effect of random errors in gridded bathymetric compilations
We address the problem of compiling bathymetric data sets with heterogeneous coverage and a range of data measurement accuracies. To generate a regularly spaced grid, we are obliged to interpolate sparse data; our objective here is to augment this product with an estimate of confidence in the interp...
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ftuninhampshire:oai:scholars.unh.edu:ccom-1114 2023-05-15T14:56:10+02:00 On the effect of random errors in gridded bathymetric compilations Jakobsson, Martin Calder, Brian R. Mayer, Larry A. 2002-12-20T08:00:00Z application/pdf https://scholars.unh.edu/ccom/115 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1114&context=ccom unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/ccom/115 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1114&context=ccom Center for Coastal and Ocean Mapping bathymetry Arctic Ocean IBCAO errors Monte Carlo grid Oceanography and Atmospheric Sciences and Meteorology text 2002 ftuninhampshire 2023-01-30T21:31:51Z We address the problem of compiling bathymetric data sets with heterogeneous coverage and a range of data measurement accuracies. To generate a regularly spaced grid, we are obliged to interpolate sparse data; our objective here is to augment this product with an estimate of confidence in the interpolated bathymetry based on our knowledge of the component of random error in the bathymetric source data. Using a direct simulation Monte Carlo method, we utilize data from the International Bathymetric Chart of the Arctic Ocean database to develop a suitable methodology for assessment of the standard deviations of depths in the interpolated grid. Our assessment of random errors in each data set are heuristic but realistic and are based on available metadata from the data providers. We show that a confidence grid can be built using this method and that this product can be used to assess reliability of the final compilation. The methodology as developed here is applied to bathymetric data but is equally applicable to other interpolated data sets, such as gravity and magnetic data. Text Arctic Arctic Ocean University of New Hampshire: Scholars Repository Arctic Arctic Ocean |
institution |
Open Polar |
collection |
University of New Hampshire: Scholars Repository |
op_collection_id |
ftuninhampshire |
language |
unknown |
topic |
bathymetry Arctic Ocean IBCAO errors Monte Carlo grid Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
bathymetry Arctic Ocean IBCAO errors Monte Carlo grid Oceanography and Atmospheric Sciences and Meteorology Jakobsson, Martin Calder, Brian R. Mayer, Larry A. On the effect of random errors in gridded bathymetric compilations |
topic_facet |
bathymetry Arctic Ocean IBCAO errors Monte Carlo grid Oceanography and Atmospheric Sciences and Meteorology |
description |
We address the problem of compiling bathymetric data sets with heterogeneous coverage and a range of data measurement accuracies. To generate a regularly spaced grid, we are obliged to interpolate sparse data; our objective here is to augment this product with an estimate of confidence in the interpolated bathymetry based on our knowledge of the component of random error in the bathymetric source data. Using a direct simulation Monte Carlo method, we utilize data from the International Bathymetric Chart of the Arctic Ocean database to develop a suitable methodology for assessment of the standard deviations of depths in the interpolated grid. Our assessment of random errors in each data set are heuristic but realistic and are based on available metadata from the data providers. We show that a confidence grid can be built using this method and that this product can be used to assess reliability of the final compilation. The methodology as developed here is applied to bathymetric data but is equally applicable to other interpolated data sets, such as gravity and magnetic data. |
format |
Text |
author |
Jakobsson, Martin Calder, Brian R. Mayer, Larry A. |
author_facet |
Jakobsson, Martin Calder, Brian R. Mayer, Larry A. |
author_sort |
Jakobsson, Martin |
title |
On the effect of random errors in gridded bathymetric compilations |
title_short |
On the effect of random errors in gridded bathymetric compilations |
title_full |
On the effect of random errors in gridded bathymetric compilations |
title_fullStr |
On the effect of random errors in gridded bathymetric compilations |
title_full_unstemmed |
On the effect of random errors in gridded bathymetric compilations |
title_sort |
on the effect of random errors in gridded bathymetric compilations |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
2002 |
url |
https://scholars.unh.edu/ccom/115 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1114&context=ccom |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_source |
Center for Coastal and Ocean Mapping |
op_relation |
https://scholars.unh.edu/ccom/115 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1114&context=ccom |
_version_ |
1766328188173025280 |